# Multisystem Inflammatory Syndrome in Adults-Related Unstable Angina With Coronary Aneurysm in a Young Female: A Case Report

## TL;DR

A young woman developed unstable angina and coronary aneurysms six months after a COVID-19 infection, treated surgically and with approaches similar to Kawasaki disease.

## Contribution

This case report highlights the potential long-term cardiovascular complications of MIS-A and the need for further research on its pathology and prognosis.

## Key findings

- A 27-year-old female developed unstable angina and coronary aneurysms six months after a confirmed COVID-19 infection.
- Treatment for unstable angina included surgery, which improved her chest pain.
- The case suggests a possible link between MIS-A and coronary artery lesions similar to those seen in Kawasaki disease.

## Abstract

Multisystem inflammatory syndrome in adults (MIS-A) is a systemic inflammatory disease associated with COVID-19 and follows coronary artery aneurysms similar to Kawasaki disease. In many cases, it is improved by treatments such as high-dose steroids or intravenous immunoglobulin (IVIg). However, the role of untreated coronary artery aneurysms leading to future stenosis remains unknown. Untreated MIS-A may potentially lead to the formation of coronary aneurysms. In cases of COVID-19 where young adults present with angina-like symptoms, an evaluation for angina is considered. Herein, we report a case of a 27-year-old female who developed unstable angina with coronary artery aneurysms six months after COVID-19 infection. She required surgery for unstable angina, which resulted in an improvement in chest pain. Coronary artery lesions are considered to be related to MIS-A, and treatment was conducted in accordance with that for Kawasaki disease. Currently, the pathological differences and prognosis between MIS-A and Kawasaki disease remain unclear, but the elucidation of the conditions is warranted in the future.